Flat warts are caused by an infection with the human papillomavirus, commonly known as HPV. This disease currently has a particularly high incidence rate, with most people having one or more flat warts on their skin. Once they appear, they can be completely cured with proper treatment. This condition is not considered particularly severe, but it is highly contagious and recurrent. When bathing at home, it's important to use separate towels or washcloths from other family members to prevent cross-infection. It is also advisable to avoid spicy and irritating foods, avoid staying up late, exercise regularly, and strengthen the immune system for a faster recovery from the disease.